import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    {
      path: '/home', component: Home,
      redirect:'/welcome',
      children: [
        { path: '/welcome', component: Welcome },
        { path: '/users', component: Users },
        { path: '/rights', component: Rights },
        {path: '/roles', component: Roles}
      ]
    }
  ]
})
// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  //to将要访问的页面  from代表从哪个路径跳转而来 
  // next是一个函数，代表放行  next()直接放行   next('/login) 强制跳转到login页面
  if (to.path === '/login') return next();
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})
export default router
